Glad you got the first one done. Sorry about
the pain and discomfort....that wasn't at all my experience.
In my case, I had a spinal block (epidural) that took all pain and feeling away from my hips down for several hours. I also was put under a mild anaesthesia during the catheter insertion for about 45 minutes.
I never had any pain or discomfort during the fine tuning of the catheters, the insertion of the radiation wire, and the removal of the template and 15 catheters an the Foley catheter. Never felt a thing and had no pain or discomfort after the block wore off. When they removed the sutures holding the catheters and template to the body and then pulled the catheters out in one pull I didn't even realize they had done it as I felt nothing. Same with the removal of the Foley catheter.
Before your next procedure ask if you can have a spinal block. The reason urinating was painful is that they probably didn't use a Foley catheter lubricant that had lidocaine to numb the uretha If they do that, there should be no burning.
I had my procedure in the afternoon, so I went home afterwards and relaxed in the evening. Back to work the next day and on the second day I was back in the gym.